Benjamin hooker



(o Model.) 2 Sheets-Sheet 1. B., P. 8v H.HOOKER. PAPER CUTTER.

No. 582,288. Patented May 11,1897.

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(No Model.) 2 sheets-sheen 2.

B., P. 81; H. HOOKER.A

PAPER GUTTER.

180.582,288; n Patented May ll; 1897.

C(?- p3 W/ l/{///////////////// //7/// /////L UNITED STATES PATENT CEEICE.

BENJAMIN HOOKER, FREDERICK HOOKER, AND HENRY HOOKER; OE

LONDON, ENGLAND.

PAPER-CUTTER.

SPECIFICATION forming part of Letters Patent No. 582,288, dated May 11, 1897.

Application led .Tuly 3l, 1895. Serial No. 557,777. (N0 model.) Patented in England March 25,1895,No.6,141.

To all la7/00111, it may concern:

Be it known that We, BENJAMIN HOOKER, FREDERICK HOOKER, and HENRY HOOKER, subjects of the Queen of Great Britain and Ireland, residing at Pear Tree Court, Farringdon Road, London, England, have invented a new and useful Guillotine Cutting-Machine for Paper, Cardboard, and other Materials, (for which Letters Patent of Great Britain have been obtained on the 25th day of March, 1895, No. 6,l4l,) of which the following is a specication.

Our invention relates to an improved guillotine cutting-machine for paper, cardboard, and other materials in which the force required for operating the clamping and cuttin g devices is obtained by means of a hydraulicpressure ram which is connected by suitable means to the said clamp and cutting-knife.

In Order that our invention may be readily understood, reference is had to the accompanying drawings, which illustrate a guillotine constructed in accordance with our in vention, parts of the machine being removed to show the essential features of the invention.

Figure l is a front view of the machine. Fig. 2 is a back view of the upper part of same, showing the clamp and a locking device hereinafter described. Fig. 3 is an elevation showing the position of the parts of the machine when the knife has descended to its lowest point and immediately before the return stroke is commenced, and Fig. 4 is a sectional elevation of details of lockin g device hereinafter described.

The frame A of our improved machine is substantially of similar design and construction to that hitherto employed in machines of this descriptiombeing provided with guides in the side frames or standards for the vertical movement of the clamp B and knife-carrier C, which rise and fall therein in the ordinary and well-known manner.

The hydraulic mechanism for operating the clamping and cutting devices consists of a cylinder D, the ram or plunger E, which is connected to the said clamp B, and knife-carriage C, in the manner to be described. The said hydraulic cylinder D is arranged beneath the bed or table of the machine, and

the longitudinal axis of the said cylinder is parallel to the direction of the movement of the clamp and cutting-knife, as shown.

The ram or plunger E of the cylinder D is provided at its outer end with a transverse rocking arm F, which extends on Opposite sides of the said plunger, being mounted thereon on a center f. One end of the said rocking arm F is connected by the rod G to the end of the clamp B and the other end by a similar rod H to the end of the knife-car* rier C.

The cylinder D is provided with a valve d, controlling lthe admission and escape of the iuid, the valve being` of the usual and wellknown slide pattern and operated in the following manner: tt is a Iod parallel to the axis of the cylinder D, connected at one end to the knife-carrier C and moving therewith. b is an adjustable striker or arm mounted on and carried by said rod o. The valve-rod c is connected at one end to a starting or hand lever J and carries dogs or stops d and e, respectively.

The operation ofthe machine is as follows: The material to be .out being adjusted on the table of the machine (not shown in the drawings) in the Ordinary manner, the hand-lever J is moved so as to open the valve and admit the operating Huid behind the ram, forcing out the latter, which, moving outward, carrying the arm F with it, brings down the clamp B and knife-carrier C. When the clamp B has descended to the required distance-viz., when it rests on the top of the material to be cut-the descent of the clamp is arrested and the end of the arm F, connected to the clamp by the rod G, is likewise arrested, but the continued motion of the ram E rotates the arm F on the center f and'causes the motion of the ram, through the conIIecting-rod H, to bring down the knife, thus eifect-ing the cut. When the knife reaches the lowest point of its descent, the striker h comes in contact with the stop c on the valve-rod and forces it downward, thereby throwing over the valve and allowing the iiuid to be admitted to the opposite side of the ram, forcing up the latter and raising the clamp and knife-carrier to their original position. Cn the return stroke the striker b contacts with the dog cl' and shuts IOO off the valve-inlet, and opening the exhaust permits the iiuid within the cylinder to escape.

In order to insure suficient pressure upon the clamp, after the latter comes in contact with the surface of the material, until the cut is commenced, we hinge at the end of the knife-carriage a lever k, held down by a spring 7u and having a notch 7a2, adapted to receive a roller l on a stud on the clamp. Vhen in operation, therefore, on the stoppage of the clamp the continued motion of the knife-carrier exerts pressure on the roller-stud l by means of the lever until the cutis commenced, when, owing to the pressure exerted by the continued downward movement of the knifecarrier, the lever will be caused to have a slight pivotal movement sufficient to cause it t6 freethe-roller Z, as seen in Fig. 3. During the cut the clamp islocked by means of a device consisting of a rod R, fastened to the upper part of the frame, the said rod R having a sleeve o thereon, which is attached to a stud or bolt s, passing through the clamp. The outer end of the bolt s is connected to a lever T, fulcrumed at t and having a roller u at its other end which travels on an inclined plate U on the knife-carriage, the lower edge of the said plate being beveled or sloped off, so that the roller u may readily ride onto said plate U. On the arrest of the descent of the clamp the end of the lever T carrying the roller u will be forced outward by the plate U, thus causing the sleeve r to exert pressure on the rod R and securely lock the clamp until the return stroke of the knife-carrier releases the lever T and allows the clamp to be raised.

As the movement of the clamp is in a diagonal direction and a direct vertical pressure is required on the surface of the material, we provide the clamp at its lower edge with a loose bar w, having a vertical motion in guides on the framing, antifriction-rollers 'u being interposed between the upper side of said bar and under side of the clamp.

By reason of the bar 1U being loosely arranged, and the provision of the antifrictionrollers, the tendency of the material to shift or move diagonally under the diagonal pressure of the clamp is avoided, or at least considerably lessened, inasmuch as the rollers will under such pressure turn, thus avoiding any resistance in au opposite direction, which would be caused were the said rollers and bar not provided and a iirm unyielding support for the material employed.

The pressure exerted-by the ram being distributed between the knife-carrier and clamp, it will be readily understood that the pressure on the latter will be in a definite ratio to that on the carrier. Thus should an extra pressure be required on the knife owing to the dullness of its edge, the nature of the material, or other cause the clamp will exert an extra pressure in like proportion.

In ordinary self-clamping guillotines the pressure on the clamp is entirely independent of the cut, and it frequently happens that the extra pressure on the cut from the causes previously stated moves the material and spoils the cut. This objection is entirely obviated by our invention, a sufficient pressure being exerted by both knife and clamp according to requirement. A

A further advantage obtained by our invention is that in a machine constructed in accordance therewith the depth of the cut can be regulated according to the height of the work by simply adjusting the stop cl' to open the valve-exhaust at the required point on the return stroke of the ram. The hand-leve r J, connected to the valve-rod, also allows the operator to raise or lower the clamp and cutting-knife at will and from any point between their highest and lowest positions, while the speed of the cut is regulated by the extent to which the valve is opened.

The fluid-pressure required can be obtained from any convenient source without departing from the spirit of our invention.

l-Iavin g thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

l. In a cutting-machine of the character described, the combination with a movable knife-carrier, and a movable clamp, of a hydraulic cylinder having its longitudinal axis in a plane parallel to the direction of movement of the carrier and clamp; a ram operating in said cylinder, a rock-arm pivotally mounted on said ram, and rods connecting opposite ends of said rock-arm with the carrier and clamp, as and for the purpose specified.

2. In a cutting-machine of the character described, the combination with a movable knife-carrier and a movable clamp, of a l1 ydraulic cylinder having its longitudinal axis in a plane parallel to the direction of movement of the carrier and clamp, a ram operating in said cylinder, a rock-arm pivotally mounted on said ram, rods connecting opposite ends of the rock-arm with the carrier and clamp, and a locking device for temporarily locking the clamp' to the carrier until after the knife on the latter has begun its cut.

3. In a cutting-machine of the character described, the combination with a movable knife-carrier and a movable clamp, of a hydraulic cylinder having its longitudinal axis in a plane parallel to the direction of movement of the carrier and clamp, a ram operating in said cylinder, a rock-arm pivotally mounted on the ram, rods connecting opposite ends of the rock-arm with the carrier and clamp, an arm pivotally mounted on the carrier, said arm being provided with a notch and a roller or stud on the clamp, and a spring operating upon the said pivoted arm to cause the same to be temporarily engaged by the roller or stud entering within the notch of the arm.

4. In a cutting-machine of the character described the combination with a movable knife-carrier and a movable clamp, of a hy- IOO IIO

draulic cylinder having its longitudinal axis in aplane parallel with the direction of movement of the carrier and clamp, a ram operating in the cylinder, connections between the ram, and the carrier and clamp, a valve controlling the admission of the operating fluid to opposite sides of the ram, a valve-rod, dogs or stops on the valve-rod, a rod c011- nected and moving with the knife-carrier and a striker on the latter rod adapted to comein contact with t-he stops 0n the valve-rod and operate the latter in the manner described.

5. In a cutting-machine of the character described, the combination with a movable knife-carrier and a movable clamp, of a hydraulic cylinder having its longitudinal axis in aplane parallel with the direction of movement of the carrier and clamp, a ram operating in the cylinder, connections between the ram and the carrier and clamp, a valve controlling the admission of the operating fluid to opposite sides of the ram, avalve-rod, dogs or stops on the valve-rod, a rod connected and moving with the knifeecarrier, a striker on the latter rod adapted to come in contact with the stops on the valve-rod and operate described, the combination with a movabley clamp and a movable knife-carrier, of an inclined plate on the carrier, a rod, a sleeve movable thereon, and attached to a bolt on the clamp, and a lever fulcrumed on the bolt and carrying a roller adapted to travel on the inclined plate, al1 as described for the purpose speciiied.

BENJAMIN HOOKER. FREDERICK HOOKER. HENRY HOOKER.

YVitnesses:

THOMAS PULLIN,` HENRY W. MASTERS. 

